Paper-drying machine



` i (Model.) J. S. PIPER.

- Paper Drying Machine.

No. 243,615, Patemed June`28, 188|.

Mfg W' mw BY ATTORNBYS.

UNITED STATES PATENT OFFICE.

JAMES S. PIPER, OF ROGKFORD, ILLINOIS.

PAPER-DRYING MACHINE.

SPECIFICATION formng part of Letters Patent No. 243,615, dated June 28,1881. v

I Application filed December 6, 1880. (Model.)

To all whom it may concem Be it known that I, J AMEs S. PIPER, ofRockford, in the county of Vinnehago and State of Illinois, haveinvented a new and useful Improvement in Paper-Drying Machines, of whichthe following is a specification.

My improvements relate to machines for drying the wet sheet from auordinary cylin-I der, Fourdrinier or other paper-machine, the specialobject of the invention being to give a lap or beily to the sheetduringthe drying operation, whereby such sheets are adaptcd for useinthe' manufacture ot' paper barrels.

My invention consists in convex or barrelshape"d dryingrollers or drumsarranged in a train and fitted to receive and hold the wet sheet (luringcontraction in drying, so that the dried sheetshall have the requiredfullness or' belly extending lengthwise. I

In the accompanying drawings, forming part of this specification, Figurel.is a side elevation of a drying-machine containing my improvements.Fig. 2 is plan view w of the same; and Fig. 3 is a longitudinal sectionof one roller.

Similar letters of reference indicate corresponding parts.

A A are side frames supporting' the stretchiug and drying` rollers ordrums B, which are sustained by suitable boxes in a horizontal line toform a train, as in ordinary dryingmachines;

a a are rollers sustained in boxes on frames A contiguous to the surfaceof rollers B, and carrying an endless felt, O.

The rollers or drums B have their surfaces formed couvex or with a bilgecorresponding` to a barrel, the shape and size being similar to thebarrels into which the dried sheet is to be subsequently made. Theseconvex drums are hollow, and have hollow trunnions for admission ofsteam, as usual.

The felt O 'is for-med of concave shape in cross-section or with afullness to correspond with the convexity of drnms B. Thefelt-supporting roliers a are also made convex to conform to the felt,and are to be arranged in any suitable manner for properly carryin g thefelt.

In operation the wet sheet from the papermachine is taken by the felt Oand carried beneath the drums B successively. The sheet is therebystretched between its sides, and by the contraction in drying assumesthe convcx shape of the drums, so that when delivered it has therequired fullness or belly. The dried sheet is to be wouud on a couvexreel, and will be subsequently'rollcd on a suitable mandrel to formbarrels having the required bilge shape.

I am aware that in the manufacture of barrels from paper-pulp the pulphasbeen carried forward by concave endless'belts to concave formers.Such I do not claim. The process of manufacture is different, and suchmachine-forms the barrel complete. p

Having thus fully described my inVention,I claim as new and desire tosecure by Letters Patent- 1. In paper-drying machines, a train of convexor barrel-shaped drying-drums fitted to stretch and shape the web orsheet of wet paper, substant-ially as shown and described.

2. In paper-drying machines, the combination oficonvex drying-dru ms Band convex endless felt O, carried by rollers a, substantially as andfor the purposes set forth.

JAMES S. PIPER.

Witnesses :i

EBENEZER FLEMING, IRVIN FRENCH.

